diff --git a/src/naxx40Scripts/custom_spells_40.cpp b/src/naxx40Scripts/custom_spells_40.cpp
index e25f109..f013ad7 100644
--- a/src/naxx40Scripts/custom_spells_40.cpp
+++ b/src/naxx40Scripts/custom_spells_40.cpp
@@ -250,41 +250,22 @@ class spell_sapphiron_icebolt_40 : public SpellScript
 };
 
 // 28531 - Frost Aura
-enum FrostAura
-{
-    SPELL_FROST_AURA = 28531,
-};
-
 class spell_sapphiron_frost_aura_40 : public AuraScript
 {
     PrepareAuraScript(spell_sapphiron_frost_aura_40);
 
-    bool Validate(SpellInfo const* /*spellInfo*/) override
-    {
-        return ValidateSpellInfo({ SPELL_FROST_AURA });
-    }
-
-    void OnApply(AuraEffect const* /*aurEff*/, AuraEffectHandleModes /*mode*/)
-    {
-        Unit* caster = GetCaster();
-        if (!caster || (caster->GetMap()->GetDifficulty() != RAID_DIFFICULTY_10MAN_HEROIC))
-            return;
-        int32 bp0 = 600;
-        caster->CastCustomSpell(caster, SPELL_FROST_AURA, &bp0, nullptr, nullptr, false, nullptr, nullptr, GetCasterGUID());
-    }
-
     void CalculateAmount(AuraEffect const* /*aurEff*/, int32& amount, bool& /*canBeRecalculated*/)
     {
         Unit* caster = GetCaster();
         if (!caster || (caster->GetMap()->GetDifficulty() != RAID_DIFFICULTY_10MAN_HEROIC))
             return;
         if (urand(0, 99) == 0) // 1% chance to receive extra Frost Aura tick
-            amount *= 2;
+            return;
+        amount *= 0.5; // Reduce damage by 50% (1200bp -> 600bp)
     }
 
     void Register() override
     {
-        OnEffectApply += AuraEffectApplyFn(spell_sapphiron_frost_aura_40::OnApply, EFFECT_0, SPELL_AURA_PERIODIC_DAMAGE, AURA_EFFECT_HANDLE_REAL);
         DoEffectCalcAmount += AuraEffectCalcAmountFn(spell_sapphiron_frost_aura_40::CalculateAmount, EFFECT_0, SPELL_AURA_PERIODIC_DAMAGE);
     }
 };